MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Instrukcja Użytkownika Pobierz pdf (Strona 188)

8 Programming the GUI

8-16

% Choose default command line output for mygui

handles.output = hObject;

% Update handles structure

guidata(hObject, handles);

% UIWAIT makes mygui wait for user response (see UIRESUME)

% uiwait(handles.mygui);

Input Arguments

The opening function has four input arguments hObject, eventdata, handles,

and

varargin. The first three are the same as described in “Input Arguments”

on page 8-13. the last argument,

varargin, enables you to pass arguments

from the command line to the opening function. The opening function can make

such arguments available to the callbacks by adding them to the

handles

structure.

For more information about

varargin, see the varargin reference page and

Passing Variable Numbers of Arguments in the MATLAB documentation.

All command line arguments are passed to the opening function via

varargin.

If you open the GUI with a property name/property value pair as arguments,

the GUI opens with the property set to the specified value. For example,

my_gui('Position', [71.8 44.9 74.8 19.7]) opens the GUI at the specified

position, since

Position is a valid figure property.

If the input argument is not a valid figure property, you must add code to the

opening function to make use of the argument. For an example, look at the

opening function for the

Modal Question Dialog GUI template, available from

the GUIDE Quick Start dialog box. The added code enables you to open the

modal dialog with the syntax

mygui('String','Do you want to exit?')

which displays the text 'Do you want to exit?' on the GUI. In this case, it is

necessary to add code to the opening function because

'String' is not a valid

figure property.

Initial Template Code

Initially, the input function template contains these lines of code:

1 2 ... 183 184 185 186 187 188 189 190 191 192 193 ... 329 330

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Instrukcja Użytkownika Strona 188